Pretty much every job in the world has its bad moments. Super Bowl-winning quarterback? By the end of the season your ribs, shoulders, knees and arm are so sore you probably have trouble turning over in bed.

1.) Careers do not come with instructions. There are no "hard and fast" rules, no simple formulas for success. This is because you will work for - and with - other human beings, and people are complex and confusing creatures.

Our time is a gift. I worry that we take it for granted. Roughly 73,500 years ago, humans were migrating from Africa towards other parts of our planet. The Sumatera volcano exploded, changing Earth’s climate. All but a few thousand humans perished. Our race nearly ended, due to natural causes. Our time is a gift.